Cat doorknob cover



FIG. 1 is a top right perspective view of the cat doorknob cover of my design;

FIG. 2 is a top right rear perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left elevation view thereof;

FIG. 6 is a right elevation view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is a top left perspective exploded view thereof in combination with a doorknob shown in broken lines.

The broken lines shown represent portions of the cat doorknob cover and environmental subject matter that form no part of the claimed design. 

CLAIM The ornamental design for a cat doorknob cover, as shown and described. 